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Black metal box with three front sockets, USB port, switch and indicator light

Rockstone Power

Rockstone Power RT1000W 500W Step Up/Down Transformer 110/120/220/240V USB Port

SKU CH-C26W-A4JSC

Converts between 110-120V and 220-240V with 500W continuous power, 1000W peak, plus a 5V USB port

  • Output peak power1000 W

Output Peak Power 1000W

  • Step up 110-120V to 220-240V for global appliance use
  • Step down 220-240V to 110-120V for imported equipment
  • 500W continuous capacity handles heavy-duty devices
  • 1000W peak power absorbs startup surges safely
  • 5V USB port charges phones without extra adapter

500 W Step-Up/Down Transformer

This Rockstone Power RT1000W unit converts AC mains between 110-120 V and 220-240 V in either direction. It is built for users who need to run appliances designed for one voltage standard on a supply using the other.

Patented 3-Mode Output Sockets

The transformer provides a 5 V USB port, a 120 V USA socket and a 220 V universal socket simultaneously. A hard-wired USA three-prong cord, an ON/OFF switch with LED indicator, full-range fuse protection and CE certification complete the feature set.

Suits Single Low-Power Devices

Buyers powering one appliance rated well below 500 W will find this converter adequate. Those needing continuous 1000 W operation or multiple high-draw loads should look at a larger capacity model.

How it compares

Measured against everything we stock in DC-to-AC Power Inverters, at today’s prices. Recalculated every night.

Price $42.99
Pricier than about 76% of the 866 comparable items (median $25.99).

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Specifications

Product
Brand nameRockstone Power
Model nameRT1000 W
Power
Output powerNo
Output peak power1000 W
Continuous wattsNo

Other versions of this model

3 more in the same range

Questions about this item

Does the 500 W continuous rating mean I will need to replace the internal fuse if I run it near that limit for hours?

The unit uses full-range fuse protection; a sustained load close to 500 W can blow the fuse, which is user-replaceable.

Will the 1000 W peak capacity handle the inrush current of a 500 W motor without tripping the circuit breaker?

The 1000 W peak rating covers short surges, but a 500 W motor’s start-up current can exceed that and trip the breaker.

How hot does the metal casing get when the transformer runs at 500 W all day, and is there a fan?

The metal casing dissipates heat passively; no fan is fitted, so the enclosure becomes warm during continuous 500 W operation.

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